If I set a preset using the remote control, can I call that preset from the IP interface?

Yes. You can set a preset from the IR Remote and recall that same preset from the WebUI or OBS plugin.

But there will be a difference between the preset name of the remote control and the OBS plugin.

These operations also work in reverse allowing you to set a preset from the WebUI or OBS plugin and recall from the IR Remote.

But you can not set a preset from IR remote and call that same preset from the ZowiePTZ.